Optical image capturing system

ABSTRACT

The invention discloses a three-piece optical lens for capturing image and a three-piece optical module for capturing image. In order from an object side to an image side, the optical lens along the optical axis comprises a first lens with positive refractive power; a second lens with refractive power; and a third lens with refractive power; and at least one of the image-side surface and object-side surface of each of the three lens elements are aspheric. The optical lens can increase aperture value and improve the imaging quality for use in compact cameras.

BACKGROUND OF THE INVENTION Technical Field

The present invention relates generally to an optical system, and moreparticularly to a compact optical image capturing system for anelectronic device.

Description of Related Art

In recent years, with the rise of portable electronic devices havingcamera functionalities, the demand for an optical image capturing systemis raised gradually. The image sensing device of the ordinaryphotographing camera is commonly selected from charge coupled device(CCD) or complementary metal-oxide semiconductor sensor (CMOS Sensor).In addition, as advanced semiconductor manufacturing technology enablesthe minimization of the pixel size of the image sensing device, thedevelopment of the optical image capturing system towards the field ofhigh pixels. Therefore, the requirement for high imaging quality israpidly raised.

The conventional optical system of the portable electronic deviceusually has two lenses. However, the optical system is asked to takepictures in a dark environment, or is asked to provide a wide view angleto satisfy the requirement for taking selfies through the front cameraof a portable phone. In other words, the optical system is asked to havea large aperture. However, an optical system having large apertureusually generates aberrations, which causes poor imaging quality atperipheral portions, and also increases the difficulty of manufacturingsuch an optical system. In addition, an optical system with a wide viewangle usually has higher distortion while imaging. The conventionaloptical system could not provide high optical performance as required.

It is an important issue to increase the amount of light entering thelens, and to widen the view angle of an optical image capturing system.In addition, the modem lens is asked not only to contain more totalpixels, to provide higher image quality, but also to balance therequirements for a miniature optical image capturing system.

BRIEF SUMMARY OF THE INVENTION

The aspect of embodiment of the present disclosure directs to an opticalimage capturing system and an optical image capturing lens which usecombination of refractive powers, convex and concave surfaces ofthree-piece optical lenses (the convex or concave surface in thedisclosure denotes the geometrical shape of an image-side surface or anobject-side surface of each lens on an optical axis) to increase theamount of incoming light of the optical image capturing system, widenthe view angle of the optical image capturing system, and to improve thetotal pixels contained in an image and the imaging quality, so as to beapplied to minimized electronic products.

The terms and definitions thereof related to the lens parameters in theembodiments of the present invention are shown as below for furtherreference.

The lens parameter related to a length or a height in the lens:

A height for image formation of the optical image capturing system isdenoted by HOI. A height of the optical image capturing system isdenoted by HOS. A distance from the object-side surface of the firstlens to the image-side surface of the third lens is denoted by InTL. Adistance between the image-side surface of the third lens and the imageplane is denoted as InB; InTL+InB=HOS; A distance from the first lens tothe second lens is denoted by IN12 (as an example). A central thicknessof the first lens of the optical image capturing system on the opticalaxis is denoted by TP1 (as an example).

The lens parameter related to a material in the lens:

An Abbe number of the first lens in the optical image capturing systemis denoted by NA1 (as an example). A refractive index of the first lensis denoted by Nd1 (as an example).

The lens parameter related to a view angle in the lens:

A view angle is denoted by AR. Half of the view angle is denoted by HAF.A major light angle is denoted by MRA.

The lens parameter related to exit/entrance pupil in the lens:

An entrance pupil diameter of the optical image capturing system isdenoted by HEP. For any surface of any lens, a maximum effective halfdiameter (EHD) is a perpendicular distance between an optical axis and acrossing point on the surface where the incident light with a maximumviewing angle of the system passing the very edge of the entrance pupil.For example, the maximum effective half diameter of the object-sidesurface of the first lens is denoted by EHD11, the maximum effectivehalf diameter of the image-side surface of the first lens is denoted byEHD12, the maximum effective half diameter of the object-side surface ofthe second lens is denoted by EHD21, the maximum effective half diameterof the image-side surface of the second lens is denoted by EHD22, and soon.

The lens parameter related to a depth of the lens shape:

A displacement from a point on the object-side surface of the thirdlens, which is passed through by the optical axis, to a point on theoptical axis, where a projection of the maximum effective semi diameterof the object-side surface of the third lens ends, is denoted by InRS31(as an example). A distance in parallel with the optical axis from apoint on the image-side surface of the third lens where the optical axispasses through to the position of the maximum effective semi diameter onthe image-side surface of the third lens is denoted by InRS32 (as anexample).

The lens parameter related to the lens shape:

A critical point C is a tangent point on a surface of a specific lens,and the tangent point is tangent to a plane perpendicular to the opticalaxis and the tangent point cannot be a crossover point on the opticalaxis. By the definition, a distance perpendicular to the optical axisbetween a critical point C21 on the object-side surface of the secondlens and the optical axis is denoted by HVT21 (as an example), and adistance perpendicular to the optical axis between a critical point C22on the image-side surface of the second lens and the optical axis isdenoted by HVT22 (as an example). A distance perpendicular to theoptical axis between a critical point C31 on the object-side surface ofthe third lens and the optical axis is denoted by HVT31 (as an example),and a distance perpendicular to the optical axis between a criticalpoint C32 on the image-side surface of the third lens and the opticalaxis is denoted by HVT32 (as an example). A distance perpendicular tothe optical axis between a critical point on the object-side orimage-side surface of other lenses the optical axis is denoted in thesame manner.

The object-side surface of the third lens has one inflection point IF311which is nearest to the optical axis, and the sinkage value of theinflection point IF311 is denoted by SGI311 (as an example). A distanceperpendicular to the optical axis between the inflection point IF311 andthe optical axis is HIF311 (as an example). The image-side surface ofthe third lens has one inflection point IF321 which is nearest to theoptical axis, and the sinkage value of the inflection point IF321 isdenoted by SGI321 (as an example). A distance perpendicular to theoptical axis between the inflection point IF321 and the optical axis isHIF321 (as an example).

The object-side surface of the third lens has one inflection point IF312which is the second nearest to the optical axis, and the sinkage valueof the inflection point IF312 is denoted by SGI312 (as an example). Adistance perpendicular to the optical axis between the inflection pointIF312 and the optical axis is HIF312 (as an example). The image-sidesurface of the third lens has one inflection point IF322 which is thesecond nearest to the optical axis, and the sinkage value of theinflection point IF322 is denoted by SGI322 (as an example). A distanceperpendicular to the optical axis between the inflection point IF322 andthe optical axis is HIF322 (as an example).

The object-side surface of the third lens has one inflection point IF313which is the third nearest to the optical axis, and the sinkage value ofthe inflection point IF313 is denoted by SGI313 (as an example). Adistance perpendicular to the optical axis between the inflection pointIF313 and the optical axis is HIF313 (as an example). The image-sidesurface of the third lens has one inflection point IF323 which is thethird nearest to the optical axis, and the sinkage value of theinflection point IF323 is denoted by SGI323 (as an example). A distanceperpendicular to the optical axis between the inflection point IF323 andthe optical axis is HIF323 (as an example).

The object-side surface of the third lens has one inflection point IF314which is the fourth nearest to the optical axis, and the sinkage valueof the inflection point IF314 is denoted by SGI314 (as an example). Adistance perpendicular to the optical axis between the inflection pointIF314 and the optical axis is HIF314 (as an example). The image-sidesurface of the third lens has one inflection point IF324 which is thefourth nearest to the optical axis, and the sinkage value of theinflection point IF324 is denoted by SGI324 (as an example). A distanceperpendicular to the optical axis between the inflection point IF324 andthe optical axis is HIF324 (as an example).

An inflection point, a distance perpendicular to the optical axisbetween the inflection point and the optical axis, and a sinkage valuethereof on the object-side surface or image-side surface of other lensesis denoted in the same manner.

The lens parameter related to an aberration:

Optical distortion for image formation in the optical image capturingsystem is denoted by ODT. TV distortion for image formation in theoptical image capturing system is denoted by TDT. Further, the range ofthe aberration offset for the view of image formation may be limited to50%-100% field. An offset of the spherical aberration is denoted by DFS.An offset of the coma aberration is denoted by DFC.

A modulation transfer function (MTF) graph of an optical image capturingsystem is used to test and evaluate the contrast and sharpness of thegenerated images. The vertical axis of the coordinate system of the MTFgraph represents the contrast transfer rate, of which the value isbetween 0 and 1, and the horizontal axis of the coordinate systemrepresents the spatial frequency, of which the unit is cycles/mm orlp/mm, i.e., line pairs per millimeter. Theoretically, a perfect opticalimage capturing system can present all detailed contrast and every lineof an object in an image. However, the contrast transfer rate of apractical optical image capturing system along a vertical axis thereofwould be less than 1. In addition, peripheral areas in an image wouldhave poorer realistic effect than a center area thereof has. For visiblespectrum, the values of MTF in the spatial frequency of SS cycles/mm atthe optical axis, 0.3 field of view, and 0.7 field of view on an imageplane are respectively denoted by MTFE0, MTFE3, and MTFE7; the values ofMTF in the spatial frequency of 110 cycles/mm at the optical axis, 0.3field of view, and 0.7 field of view on an image plane are respectivelydenoted by MTFQ0, MTFQ3, and MTFQ7; the values of MTF in the spatialfrequency of 220 cycles/mm at the optical axis, 0.3 field of view, and0.7 field of view on an image plane are respectively denoted by MTFH0,MTFH3, and MTFH7; the values of MTF in the spatial frequency of 440cycles/mm at the optical axis, 0.3 field of view, and 0.7 field of viewon the image plane are respectively denoted by MTF0, MTF3, and MTF7. Thethree aforementioned fields of view respectively represent the center,the inner field of view, and the outer field of view of a lens, and,therefore, can be used to evaluate the performance of an optical imagecapturing system. If the optical image capturing system provided in thepresent invention corresponds to photosensitive components which providepixels having a size no large than 1.12 micrometer, a quarter of thespatial frequency, a half of the spatial frequency (half frequency), andthe full spatial frequency (full frequency) of the MTF diagram arerespectively at least 110 cycles/mm, 220 cycles/mm and 440 cycles/mm.

If an optical image capturing system is required to be able also toimage for infrared spectrum, e.g., to be used in low-light environments,then the optical image capturing system should be workable inwavelengths of 850 nm or 800 nm. Since the main function for an opticalimage capturing system used in low-light environment is to distinguishthe shape of objects by light and shade, which does not require highresolution, it is appropriate to only use spatial frequency less than110 cycles/mm for evaluating the performance of optical image capturingsystem in the infrared spectrum. When the aforementioned wavelength of850 nm focuses on the image plane, the contrast transfer rates (i.e.,the values of MTF) in spatial frequency of 55 cycles/mm at the opticalaxis, 0.3 field of view, and 0.7 field of view on an image plane arerespectively denoted by MTF10, MTF13, and MTF17. However, infraredwavelengths of 850 nm or 800 nm are far away from the wavelengths ofvisible light; it would be difficult to design an optical imagecapturing system capable of focusing visible and infrared light (i.e.,dual-mode) at the same time and achieving certain performance.

The present invention provides an optical image capturing system, inwhich the third lens is provided with an inflection point at theobject-side surface or at the image-side surface to adjust the incidentangle of each view field and modify the ODT and the TDT. In addition,the surfaces of the third lens are capable of modifying the optical pathto improve the imagining quality.

The optical image capturing system of the present invention includes afirst lens, a second lens, a third lens, and an image plane in orderalong an optical axis from an object side to an image side. The firstlens has refractive power. The optical image capturing system satisfies:

1.0≤HEP≤10.0; 0 deg<HAF≤50 deg; and 0.5≤ETP/STP<1

where f is a focal length of the optical image capturing system; HEP isan entrance pupil diameter of the optical image capturing system; HOS isa distance between an object-side surface, which face the object side,of the first lens and the image plane on the optical axis; InTL is adistance from the object-side surface of the first lens to theimage-side surface of the third lens on the optical axis; HAF is a halfof a maximum view angle of the optical image capturing system; ETP1,ETP2, and ETP3 are respectively a thickness in parallel with the opticalaxis at a height of ½ HEP of the first lens to the third lens, whereinSETP is a sum of the aforementioned ETP1 to ETP3; TP1, TP2, and TP3 arerespectively a thickness at the optical axis of the first lens to thethird lens, wherein STP is a sum of the aforementioned TP1 to TP3.

The present invention further provides an optical image capturingsystem, including a first lens, a second lens, a third lens, and animage plane in order along an optical axis from an object side to animage side. The optical image capturing system consists of three lenseswith refractive power. At least two lenses among the first lens to thethird lens has at least an inflection point on at least a surfacethereof. At least one lens among the second lens to the third lens haspositive refractive power. The optical image capturing system satisfies:

1.0≤f/HEP≤10.0; 0 deg<HAF≤50 deg; and 0.2≤EIN/ETL<1;

where f is a focal length of the optical image capturing system; HEP isan entrance pupil diameter of the optical image capturing system; HOS isa distance between an object-side surface, which face the object side,of the first lens and the image plane on the optical axis; InTL is adistance from the object-side surface of the first lens to theimage-side surface of the third lens on the optical axis; HAF is a halfof a maximum view angle of the optical image capturing system; ETL is adistance in parallel with the optical axis between a coordinate point ata height of ½ HEP on the object-side surface of the first lens and theimage plane; EIN is a distance in parallel with the optical axis betweenthe coordinate point at the height of ½ HEP on the object-side surfaceof the first lens and a coordinate point at a height of ½ HEP on theimage-side surface of the third lens.

The present invention further provides an optical image capturingsystem, including a first lens, a second lens, a third lens, and animage plane, in order along an optical axis from an object side to animage side. The number of the lenses having refractive power in theoptical image capturing system is three. Each of at least one lens amongthe first to the third lenses has at least an inflection point on atleast one surface thereof. The first lens has positive refractive power.The optical image capturing system satisfies:

1.0≤f/HEP≤10.0; 10 deg≤HAF≤50 deg; and 0.2≤EIN/ETL<1;

where f is a focal length of the optical image capturing system; HEP isan entrance pupil diameter of the optical image capturing system; HOS isa distance between an object-side surface, which face the object side,of the first lens and the image plane on the optical axis; InTL is adistance from the object-side surface of the first lens to theimage-side surface of the third lens on the optical axis; HAF is a halfof a maximum view angle of the optical image capturing system; ETL is adistance in parallel with the optical axis between a coordinate point ata height of ½ HEP on the object-side surface of the first lens and theimage plane; EIN is a distance in parallel with the optical axis betweenthe coordinate point at the height of ½ HEP on the object-side surfaceof the first lens and a coordinate point at a height of ½ HEP on theimage-side surface of the third lens.

For any lens, the thickness at the height of a half of the entrancepupil diameter (HEP) particularly affects the ability of correctingaberration and differences between optical paths of light in differentfields of view of the common region of each field of view of lightwithin the covered range at the height of a half of the entrance pupildiameter (HEP). With greater thickness, the ability to correctaberration is better. However, the difficulty of manufacturing increasesas well. Therefore, the thickness at the height of a half of theentrance pupil diameter (HEP) of any lens has to be controlled. Theratio between the thickness (ETP) at the height of a half of theentrance pupil diameter (HEP) and the thickness (TP) of any lens on theoptical axis (i.e., ETP/TP) has to be particularly controlled. Forexample, the thickness at the height of a half of the entrance pupildiameter (HEP) of the first lens is denoted by ETP1, the thickness atthe height of a half of the entrance pupil diameter (HEP) of the secondlens is denoted by ETP2, and the thickness at the height of a half ofthe entrance pupil diameter (HEP) of any other lens in the optical imagecapturing system is denoted in the same manner. The optical imagecapturing system of the present invention satisfies:

0.3≤SETP/EIN<1;

where SETP is the sum of the aforementioned ETP1 to ETP3.

In order to enhance the ability of correcting aberration and to lowerthe difficulty of manufacturing at the same time, the ratio between thethickness (ETP) at the height of a half of the entrance pupil diameter(HEP) and the thickness (TP) of any lens on the optical axis (i.e.,ETP/TP) has to be particularly controlled. For example, the thickness atthe height of a half of the entrance pupil diameter (HEP) of the firstlens is denoted by ETP1, the thickness of the first lens on the opticalaxis is TP1, and the ratio between these two parameters is ETP1/TP1; thethickness at the height of a half of the entrance pupil diameter (HEP)of the first lens is denoted by ETP2, the thickness of the second lenson the optical axis is TP2, and the ratio between these two parametersis ETP2/TP2. The ratio between the thickness at the height of a half ofthe entrance pupil diameter (HEP) and the thickness of any other lens inthe optical image capturing system is denoted in the same manner. Theoptical image capturing system of the present invention satisfies:

0<ETP/TP≤5.

The horizontal distance between two neighboring lenses at the height ofa half of the entrance pupil diameter (HEP) is denoted by ED, whereinthe aforementioned horizontal distance (ED) is parallel to the opticalaxis of the optical image capturing system, and particularly affects theability of correcting aberration and differences between optical pathsof light in different fields of view of the common region of each fieldof view of light at the height of a half of the entrance pupil diameter(HEP). With longer distance, the ability to correct aberration ispotential to be better. However, the difficulty of manufacturingincreases, and the feasibility of “slightly shorten” the length of theoptical image capturing system is limited as well. Therefore, thehorizontal distance (ED) between two specific neighboring lenses at theheight of a half of the entrance pupil diameter (HEP) has to becontrolled.

In order to enhance the ability of correcting aberration and to lowerthe difficulty of “slightly shorten” the length of the optical imagecapturing system at the same time, the ratio between the horizontaldistance (ED) between two neighboring lenses at the height of a half ofthe entrance pupil diameter (HEP) and the parallel distance (IN) betweenthese two neighboring lens on the optical axis (i.e., ED/IN) has to beparticularly controlled. For example, the horizontal distance betweenthe first lens and the second lens at the height of a half of theentrance pupil diameter (HEP) is denoted by ED12, the horizontaldistance between the first lens and the second lens on the optical axisis denoted by IN12, and the ratio between these two parameters isED12/IN12; the horizontal distance between the second lens and the thirdlens at the height of a half of the entrance pupil diameter (HEP) isdenoted by ED23, the horizontal distance between the second lens and thethird lens on the optical axis is denoted by IN23, and the ratio betweenthese two parameters is ED23/IN23. The ratio between the horizontaldistance between any two neighboring lenses at the height of a half ofthe entrance pupil diameter (HEP) and the horizontal distance betweenthese two neighboring lenses on the optical axis is denoted in the samemanner.

The horizontal distance in parallel with the optical axis between acoordinate point at the height of ½ HEP on the image-side surface of thethird lens and image surface is denoted by EBL. The horizontal distancein parallel with the optical axis between the point on the image-sidesurface of the third lens where the optical axis passes through and theimage plane is denoted by BL. In order to enhance the ability to correctaberration and to preserve more space for other optical components, theoptical image capturing system of the present invention can satisfy:01≤EBL/BL≤1.5.

The optical image capturing system can further include a filteringcomponent, which is provided between the third lens and the image plane,wherein the horizontal distance in parallel with the optical axisbetween the coordinate point at the height of ½ HEP on the image-sidesurface of the third lens and the filtering component is denoted by EIR,and the horizontal distance in parallel with the optical axis betweenthe point on the image-side surface of the fifth lens where the opticalaxis passes through and the filtering component is denoted by PIR. Theoptical image capturing system of the present invention can satisfy:0.1≤EIR/PIR≤1.1.

The optical image capturing system could be applied with an image sensorof which the image size is less than 1/1.2 inches in diagonal. Pixelsize of said image sensor is less than 1.4 μm, which is preferred to beless than 1.12 μm, and is most preferred to be less than 0.9 μm. Inaddition, the optical image capturing system would be compatible with animage sensor of which aspect ratio is 16:9.

Said optical image capturing system could meet the requirement forrecording megapixel videos, and could provide good image quality.

In an embodiment, a height of the optical image capturing system (HOS)can be reduced while |f1|>3.

In an embodiment, when the lenses satisfy |f2|>|f1|, the second lens hasweak positive refractive power or weak negative refractive power. Whenthe second lenses has weak positive refractive power, it may share thepositive refractive power of the first lens, and on the contrary, whenthe second lenses has weak negative refractive power, it may fine tuneand correct the aberration of the system.

In an embodiment, the third lens could have positive refractive power,and an image-side surface thereof is concave, it may reduce back focallength and size. Besides, the third lens can have at least an inflectionpoint on at least a surface thereof, which may reduce an incident angleof the light of an off-axis field of view and correct the aberration ofthe off-axis field of view.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

The present invention will be best understood by referring to thefollowing detailed description of some illustrative embodiments inconjunction with the accompanying drawings, in which

FIG. 1A is a schematic diagram of a first embodiment of the presentinvention;

FIG. 1B shows curve diagrams of longitudinal spherical aberration,astigmatic field, and optical distortion of the optical image capturingsystem in the order from left to right of the first embodiment of thepresent application;

FIG. 1C shows a feature map of modulation transformation of the opticalimage capturing system of the first embodiment of the presentapplication in visible spectrum;

FIG. 2A is a schematic diagram of a second embodiment of the presentinvention;

FIG. 2B shows curve diagrams of longitudinal spherical aberration,astigmatic field, and optical distortion of the optical image capturingsystem in the order from left to right of the second embodiment of thepresent application:

FIG. 2C shows a feature map of modulation transformation of the opticalimage capturing system of the second embodiment of the presentapplication in visible spectrum;

FIG. 3A is a schematic diagram of a third embodiment of the presentinvention;

FIG. 3B shows curve diagrams of longitudinal spherical aberration,astigmatic field, and optical distortion of the optical image capturingsystem in the order from left to right of the third embodiment of thepresent application;

FIG. 3C shows a feature map of modulation transformation of the opticalimage capturing system of the third embodiment of the presentapplication in visible spectrum;

FIG. 4A is a schematic diagram of a fourth embodiment of the presentinvention;

FIG. 4B shows curve diagrams of longitudinal spherical aberration,astigmatic field, and optical distortion of the optical image capturingsystem in the order from left to right of the fourth embodiment of thepresent application;

FIG. 4C shows a feature map of modulation transformation of the opticalimage capturing system of the fourth embodiment in visible spectrum;

FIG. 5A is a schematic diagram of a fifth embodiment of the presentinvention;

FIG. 5B shows curve diagrams of longitudinal spherical aberration,astigmatic field, and optical distortion of the optical image capturingsystem in the order from left to right of the fifth embodiment of thepresent application;

FIG. 5C shows a feature map of modulation transformation of the opticalimage capturing system of the fifth embodiment of the presentapplication in visible spectrum;

FIG. 6A is a schematic diagram of a sixth embodiment of the presentinvention;

FIG. 6B shows curve diagrams of longitudinal spherical aberration,astigmatic field, and optical distortion of the optical image capturingsystem in the order from left to right of the sixth embodiment of thepresent application; and

FIG. 6C shows a feature map of modulation transformation of the opticalimage capturing system of the sixth embodiment of the presentapplication in visible spectrum.

DETAILED DESCRIPTION OF THE INVENTION

An optical image capturing system of the present invention includes afirst lens, a second lens, and a third lens from an object side to animage side. The optical image capturing system further is provided withan image sensor at an image plane.

The optical image capturing system can also work in five wavelengths,including 480 nm, 510 nm, 555 nm, 610 nm, and 650 nm wherein 555 nm isthe main reference wavelength, and is the reference wavelength forobtaining the technical characters. Referring to obtaining the values oflateral aberration while the longest operation wavelength and theshortest operation wavelength passing through the margin of theaperture, the longest operation wavelength is set as 650 nm, the mainwavelength of light of the reference wavelength is set as $55 nm, andthe shortest operation wavelength is set as 470 nm.

The optical image capturing system of the present invention satisfies0.5≤ΣPPR/|ΣNPR|≤4.5, and a preferable range is 1≤ΣPPR/|ΣNPR|≤3.8, wherePPR is a ratio of the focal length f of the optical image capturingsystem to a focal length fp of each of lenses with positive refractivepower; NPR is a ratio of the focal length f of the optical imagecapturing system to a focal length fin of each of lenses with negativerefractive power; ΣPPR is a sum of the PPRs of each positive lens; andΣNPR is a sum of the NPRs of each negative lens. It is helpful forcontrol of an entire refractive power and an entire length of theoptical image capturing system.

The height of the optical image capturing system is denoted by HOS. WhenHOS/f is close to 1, it would help to manufacture a miniaturized opticalimage capturing system capable of providing images of hyper-rich pixels.

A sum of the focal lengths fp of each lens with positive refractivepower in the optical image capturing system is denoted by ΣPP, while asum of each lens with negative refractive power in the optical imagecapturing system is denoted by ΣNP. In an embodiment, the optical imagecapturing system satisfies the condition: 0<ΣPP≤200; and f1/ΣPP≤0.85.Preferably, the optical image capturing system satisfies the condition:0<ΣPP≤150; and 0.01≤f1/ΣPP≤0.6. Whereby, the focusing ability of theoptical image capturing system could be controlled. Furthermore, thepositive refractive power of the system could be properly distributed tosuppress obvious aberration from happening too early. The first lens haspositive refractive power, and an object-side surface thereof could beconvex. Whereby, the strength of the positive refractive power of thefirst lens could be properly adjusted, which helps to shorten a totallength of the optical image capturing system.

The second lens could have negative refractive power, which helps tocompensate the aberration generated by the first lens.

The third lens could have positive refractive power, and an image-sidesurface thereof could be concave. Whereby, the positive refractive powerof the first lens could be shard, and it would help to shorten the rearfocal length to maintain miniature. In addition, at least a surface ofthird lens could have at least an inflection point, which couldeffectively suppress the incidence angle of light in the off-axis fieldof view, and further correct the aberration in the off-axis field ofview. Preferably, an object-side surface and the image-side surfacethereof both have at least an inflection point.

The image sensor is provided on the image plane. The optical imagecapturing system of the present invention satisfies HOS/HOI≤3 and0.5≤HOS/f≤3.0, and a preferable range is 1≤HOS/HOI≤2.5 and 1≤HOS/f≤2,where HOI is a half of a diagonal of an effective sensing area of theimage sensor, i.e., the maximum image height, and HOS is a height of theoptical image capturing system, i.e. a distance on the optical axisbetween the object-side surface of the first lens and the image plane.It is helpful for reduction of the size of the system for used incompact cameras.

The optical image capturing system of the present invention further isprovided with an aperture to increase image quality.

In the optical image capturing system of the present invention, theaperture could be a front aperture or a middle aperture, wherein thefront aperture is provided between the object and the first lens, andthe middle is provided between the first lens and the image plane. Thefront aperture provides a long distance between an exit pupil of thesystem and the image plane, which allows more elements to be installed.The middle could enlarge a view angle of view of the system and increasethe efficiency of the image sensor. The optical image capturing systemsatisfies 0.5≤InS/HOS≤1.1, where InS is a distance between the apertureand the image plane. Preferably, the optical image capturing systemsatisfies 0.6≤InS/HOS≤1. It is helpful for size reduction and wideangle.

The optical image capturing system of the present invention satisfies0.45≤ΣTP/InTL≤0.95, where InTL is a distance between the object-sidesurface of the first lens and the image-side surface of the third lens,and ΣTP is a sum of central thicknesses of the lenses on the opticalaxis. It is helpful for the contrast of image and yield rate ofmanufacture and provides a suitable back focal length for installationof other elements.

The optical image capturing system of the present invention satisfies0.1≤|R1/R2|≤3.0, and a preferable range is 0.1≤|R1/R2|≤2.0, where R1 isa radius of curvature of the object-side surface of the first lens, andR2 is a radius of curvature of the image-side surface of the first lens.It provides the first lens with a suitable positive refractive power toreduce the increase rate of the spherical aberration.

The optical image capturing system of the present invention satisfies−200<(R5−R6)/(R5+R6)<30, where R5 is a radius of curvature of theobject-side surface of the third lens, and R6 is a radius of curvatureof the image-side surface of the third lens. It may modify theastigmatic field curvature.

The optical image capturing system of the present invention satisfies0<IN12/f≤0.30, and a preferable range is 0.01≤IN12/f≤0.25, where IN12 isa distance on the optical axis between the first lens and the secondlens. It may correct chromatic aberration and improve the performance.

The optical image capturing system of the present invention satisfiesIN23/f≤0.25, where IN23 is a distance on the optical axis between thesecond lens and the third lens. It may correct chromatic aberration andimprove the performance.

The optical image capturing system of the present invention satisfies2≤(TP1−IN12)/TP2≤10, where TP1 is a central thickness of the first lenson the optical axis, and TP2 is a central thickness of the second lenson the optical axis. It may control the sensitivity of manufacture ofthe system and improve the performance.

The optical image capturing system of the present invention satisfies1.0≤(TP3+IN23)/TP2≤10, where TP3 is a central thickness of the thirdlens on the optical axis, and IN23 is a distance between the second lensand the third lens. It may control the sensitivity of manufacture of thesystem and reduce the total height of the system.

The optical image capturing system of the present invention satisfies0.1≤TP1/TP2≤0.6; 0.1≤TP2/TP3≤0.6. It may fine tune and correct theaberration of the incident rays layer by layer, and reduce the height ofthe system.

The optical image capturing system 10 of the first embodiment furthersatisfies −1 mm≤InRS31≤1 mm; −1 mm≤InRS32≤1 mm; 1 mm≤|InRS31|+|InRS32|≤2mm; 0.01≤|InRS31|/TP3≤10; 0.01≤|InRS32|/TP3≤10, where InRS31 is adisplacement from a point on the object-side surface of the third lens,which is passed through by the optical axis, to a point on the opticalaxis, where a projection of the maximum effective semi diameter of theobject-side surface of the third lens ends (if the displacement on theoptical axis moves towards the image side, then InRS31 is a positivevalue; if the displacement on the optical axis moves towards the objectside, then InRS31 is a negative value); InRS32 is a displacement from apoint on the image-side surface of the third lens, which is passedthrough by the optical axis, to a point on the optical axis, where aprojection of the maximum effective semi diameter of the image-sidesurface of the third lens ends; and TP3 is a central thickness of thethird lens on the optical axis. Whereby, a location of the maximumeffective semi diameter between two surfaces of the third lens could becontrolled, which helps to correct the aberration of the peripheral viewfield of the optical image capturing system, and to maintain miniature.

The optical image capturing system satisfies 0<SGI311/(SGI311+TP3)≤0.9;0<SGI321/(SGI321+TP3)≤0.9, and preferably satisfies0.01<SGI311/(SGI31+TP3)≤0.7; 0.01<SGI321/(SGI321+TP3)≤0.7, where SGI311is a displacement in parallel with the optical axis, from a point on theobject-side surface of the third lens, through which the optical axispasses, to the inflection point on the object-side surface, which is theclosest to the optical axis, and SGI321 is a displacement in parallelwith the optical axis, from a point on the image-side surface of thethird lens, through which the optical axis passes, to the inflectionpoint on the image-side surface, which is the closest to the opticalaxis.

The optical image capturing system of the present invention satisfies0<SGI312/(SG312+TP3)≤0.9; 0<SGI322/(SGI322+TP3)≤0.9, and it ispreferable to satisfy 0.1≤SGI312/(SGI312+TP3)≤0.8;0.1≤SGI322/(SGI322+TP3)≤0.8, where SGI312 is a displacement in parallelwith the optical axis, from a point on the object-side surface of thethird lens, through which the optical axis passes, to the inflectionpoint on the object-side surface, which is the second closest to theoptical axis, and SGI322 is a displacement in parallel with the opticalaxis, from a point on the image-side surface of the third lens, throughwhich the optical axis passes, to the inflection point on the image-sidesurface, which is the second closest to the optical axis.

The optical image capturing system of the present invention satisfies0.01≤HIF311/HOL≤0.9; 0.01≤HIF321/HOI≤0.9, and it is preferable tosatisfy 0.09≤HIF311/HOI≤0.5; 0.09≤HIF321/HOI≤0.5, where HIF311 is adistance perpendicular to the optical axis between the inflection pointon the object-side surface of the third lens, which is the closest tothe optical axis, and the optical axis; HIF321 is a distanceperpendicular to the optical axis between the inflection point on theimage-side surface of the third lens, which is the closest to theoptical axis, and the optical axis.

The optical image capturing system of the present invention satisfies0.01≤HIF312/HOI≤0.9; 0.01≤HIF322/HOI≤0.9, and it is preferable tosatisfy 0.09≤HIF312/HOI≤0.8; 0.09≤HIF322/HOI≤0.8, where HIF312 is adistance perpendicular to the optical axis between the inflection pointon the object-side surface of the third lens, which is the secondclosest to the optical axis, and the optical axis; HIF322 is a distanceperpendicular to the optical axis between the inflection point on theimage-side surface of the third lens, which is the second closest to theoptical axis, and the optical axis.

The optical image capturing system of the present invention satisfies0.001 mm≤|HIF313|≤5 mm; 0.001 mm≤|HIF323|≤5 mm, and it is preferable tosatisfy 0.1 mm≤|HIF323|≤3.5 mm; 0.1 mm≤|HIF313|≤3.5 mm, where HIF313 isa distance perpendicular to the optical axis between the inflectionpoint on the object-side surface of the third lens, which is the thirdclosest to the optical axis, and the optical axis; HIF323 is a distanceperpendicular to the optical axis between the inflection point on theimage-side surface of the third lens, which is the third closest to theoptical axis, and the optical axis.

The optical image capturing system of the present invention satisfies0.001 mm≤|HIF314|≤5 mm; 0.001 mm≤|HIF324|≤5 mm, and it is preferable tosatisfy 0.1 mm≤|HIF324|≤3.5 mm; 0.1 mm≤|HIF314|≤3.5 mm, where HIF314 isa distance perpendicular to the optical axis between the inflectionpoint on the object-side surface of the third lens, which is the fourthclosest to the optical axis, and the optical axis; HIF324 is a distanceperpendicular to the optical axis between the inflection point on theimage-side surface of the third lens, which is the fourth closest to theoptical axis, and the optical axis.

In an embodiment, the lenses of high Abbe number and the lenses of lowAbbe number are arranged in an interlaced arrangement that could behelpful for correction of aberration of the system.

An equation of aspheric surface is

z=ch ²/[+[(1−(k+1)c ² h ²]^(0.5)]+A4h ⁴ +A6h ⁶ +A8h ⁸ +A10h ¹⁰ +A12h ¹²+A14h ¹⁴ +A 16h ¹⁶ +A18h ¹⁸ +A20h ²⁰+ . . .  (1)

where z is a depression of the aspheric surface; k is conic constant; cis reciprocal of the radius of curvature; and A4, A6, A8, A10. A12. A14,A16, A18, and A20 are high-order aspheric coefficients.

In the optical image capturing system, the lenses could be made ofplastic or glass. The plastic lenses may reduce the weight and lower thecost of the system, and the glass lenses may control the thermal effectand enlarge the space for arrangement of the refractive power of thesystem. In addition, the opposite surfaces (object-side surface andimage-side surface) of the first to the third lenses could be asphericthat can obtain more control parameters to reduce aberration. The numberof aspheric glass lenses could be less than the conventional sphericalglass lenses, which is helpful for reduction of the height of thesystem.

When the lens has a convex surface, which means that the surface isconvex around a position, through which the optical axis passes, andwhen the lens has a concave surface, which means that the surface isconcave around a position, through which the optical axis passes.

In addition, the optical image capturing system of the present inventioncould be further provided with at least an stop as required, which couldreduce stray light to improve the imaging quality.

In the optical image capturing system of the present invention, theaperture could be a front aperture or a middle aperture, wherein thefront aperture is provided between the object and the first lens, andthe middle is provided between the first lens and the image plane. Thefront aperture provides a long distance between an exit pupil of thesystem and the image plane, which allows more elements to be installed.The middle could enlarge a view angle of view of the system and increasethe efficiency of the image sensor.

The optical image capturing system of the present invention could beapplied in a dynamic focusing optical system. It is superior in thecorrection of aberration and high imaging quality so that it could beallied in lots of fields.

The optical image capturing system of the present invention couldfurther include a driving module to meet different demands, wherein thedriving module can be coupled with the lenses to move the lenses. Thedriving module can be a voice coil motor (VCM), which is used to movethe lens for focusing, or can be an optical image stabilization (OIS)component, which is used to lower the possibility of having the problemof image blurring which is caused by subtle movements of the lens whileshooting.

To meet different requirements, at least one lens among the first lensto the third lens of the optical image capturing system of the presentinvention can be a light filter, which filters out light of wavelengthshorter than 500 nm. Such effect can be achieved by coating on at leastone surface of the lens, or by using materials capable of filtering outshort waves to make the lens.

To meet different requirements, the image plane of the optical imagecapturing system in the present invention can be either flat or curved.If the image plane is curved (e.g., a sphere with a radius ofcurvature), the incidence angle required for focusing light on the imageplane can be decreased, which is not only helpful to shorten the lengthof the system (TTL), but also helpful to increase the relativeilluminance.

We provide several embodiments in conjunction with the accompanyingdrawings for the best understanding, which are:

First Embodiment

As shown in FIG. 1A and FIG. 1B, an optical image capturing system 10 ofthe first embodiment of the present invention includes, along an opticalaxis from an object side to an image side, a first lens 110, an aperture100, a second lens 120, a third lens 130, an infrared rays filter 170,an image plane 180, and an image sensor 190. FIG. 1C shows a modulationtransformation of the optical image capturing system 10 of the firstembodiment of the present application.

The first lens 110 has positive refractive power and is made of plastic.An object-side surface 112 thereof, which faces the object side, is aconvex aspheric surface, and an image-side surface 114 thereof, whichfaces the image side, is a concave aspheric surface. A thickness of thefirst lens 110 on the optical axis is TP1, and a thickness of the firstlens 110 at the height of a half of the entrance pupil diameter (HEP) isdenoted by ETP1.

The second lens 120 has negative refractive power and is made ofplastic. An object-side surface 122 thereof, which faces the objectside, is a concave aspheric surface, and an image-side surface 124thereof, which faces the image side, is a convex aspheric surface. Thesecond lens satisfies the condition: SGI221=−0.1526 mm,|SGI221|/(|SGI221|+TP2)=0.2292, where SGI221 is a displacement inparallel with the optical axis from a point on the image-side surface ofthe second lens, through which the optical axis passes, to theinflection point on the image-side surface closest to the optical axis.A thickness of the second lens 120 on the optical axis is TP2, andthickness of the second lens 120 at the height of a half of the entrancepupil diameter (HEP) is denoted by ETP2.

The second lens satisfies HIF221=0.5606 mm: HIF221/HOI=0.3128, where adisplacement perpendicular to the optical axis from a point on theimage-side surface of the second lens, through which the optical axispasses, to the inflection point closest to the optical axis is denotedby HIF221.

The third lens 130 has positive refractive power and is made of plastic.An object-side surface 132, which faces the object side, is a convexaspheric surface, and an image-side surface 134, which faces the imageside, is a concave aspheric surface. The object-side surface 132 has twoinflection points, and the image-side surface 134 has an inflectionpoint. The third lens 130 satisfies SGI311=0.0180 mm; SGI321=0.0331 mm;|SGI311|/(|SGI311|+TP3)=0.0339; |SGI321|/|SGI321|+TP3)=0.0605, whereSGI311 is a displacement in parallel with the optical axis, from a pointon the object-side surface of the third lens, through which the opticalaxis passes, to the inflection point on the object-side surface closestto the optical axis, and SGI321 is a displacement in parallel with theoptical axis, from a point on the image-side surface of the third lens,through which the optical axis passes, to the inflection point on theimage-side surface closest to the optical axis. A thickness of the thirdlens 130 on the optical axis is TP3, and a thickness of the third lens130 at the height of a half of the entrance pupil diameter (HEP) isdenoted by ETP3.

The third lens 130 satisfies SGI312=−0.0367 mm;|SGI312|/(|SGI312|+TP3)=0.0668, where SGI312 is a displacement inparallel with the optical axis, from a point on the object-side surfaceof the third lens, through which the optical axis passes, to theinflection point on the object-side surface second closest to theoptical axis.

The third lens 130 further satisfies HIF312=0.8186 mm; HIF3121HOI=0.4568, where HIF321 is a distance perpendicular to the optical axisbetween the inflection point on the image-side surface of the third lensclosest to the optical axis, and the optical axis.

A distance in parallel with the optical axis between a coordinate pointat a height of ½ HEP on the object-side surface of the first lens 110and the image plane is ETL, and a distance in parallel with the opticalaxis between the coordinate point at the height of ½ HEP on theobject-side surface of the first lens 110 and a coordinate point at aheight of ½ HEP on the image-side surface of the third lens 130 is EIN,which satisfy: ETL=2.776 mm; EIN==1.952 mm; EIN/ETL=0.703.

The optical image capturing system of the first embodiment satisfies:ETP1=0.4301 mm; ETP2=0.370 mm; ETP3=0.586 mm. The sum of theaforementioned ETP1 to ETP3 is SETP, wherein SETP=1.385 mm. In addition,TP1=0.5132 mm; TP2=0.3363 mm; TP3=0.57 mm. The sum of the aforementionedTP1 to TP3 is STP, wherein STP=1.4194 mm; SETP/STP=0.97576.

In order to enhance the ability of correcting aberration and to lowerthe difficulty of manufacturing at the same time, the ratio between thethickness (ETP) at the height of a half of the entrance pupil diameter(HEP) and the thickness (TP) of any lens on the optical axis (i.e.,ETP/TP) in the optical image capturing system of the first embodiment isparticularly controlled, which satisfies: ETP1/TP1=0.837;ETP2/TP2=1.100; ETP3/TP3=1.027.

In order to enhance the ability of correcting aberration, lower thedifficulty of manufacturing, and “slightly shortening” the length of theoptical image capturing system at the same time, the ratio between thehorizontal distance (ED) between two neighboring lenses at the height ofa half of the entrance pupil diameter (HEP) and the parallel distance(IN) between these two neighboring lens on the optical axis (i.e.,ED/IN) in the optical image capturing system of the first embodiment isparticularly controlled, which satisfies: the horizontal distancebetween the first lens 110 and the second lens 120 at the height of ahalf of the entrance pupil diameter (HEP) is denoted by ED12, whereinED12=0.223 mm; the horizontal distance between the second lens 120 andthe third lens 130 at the height of a half of the entrance pupildiameter (HEP) is denoted by ED23, wherein ED23=0.344 mm. The sum of theaforementioned ED12 to ED23 is SED, wherein SED=0.567 mm.

The horizontal distance between the first lens 110 and the second lens120 on the optical axis is denoted by IN12, wherein IN12=0.407 mm, andthe ratio therebetween ED12/IN12=0.547. The horizontal distance betweenthe second lens 120 and the third lens 130 on the optical axis isdenoted by IN23, wherein IN23=0.214 mm, and the ratio therebetweenED23/IN23=1.612.

The horizontal distance in parallel with the optical axis between acoordinate point at the height of ½ HEP on the image-side surface of thethird lens 130 and image surface is denoted by EBL, wherein EBL=0.823mm. The horizontal distance in parallel with the optical axis betweenthe point on the image-side surface of the third lens 130 where theoptical axis passes through and the image plane is denoted by BL,wherein BL=0.871 mm. The optical image capturing system of the firstembodiment satisfies: EBL/BL=0.9449. The horizontal distance in parallelwith the optical axis between the coordinate point at the height of ½HEP on the image-side surface of the third lens 130 and the infraredrays filter 190 is denoted by EIR, wherein EIR=0.063 mm. The horizontaldistance in parallel with the optical axis between the point on theimage-side surface of the third lens 130 where the optical axis passesthrough and the infrared rays filter 190 is denoted by PIR, whereinPIR=0.114 mm, and it satisfies: EIR/PIR=0.555.

The infrared rays filter 170 is made of glass and between the third lens130 and the image plane 180. The infrared rays filter 190 gives nocontribution to the focal length of the system.

The optical image capturing system 10 of the first embodiment has thefollowing parameters, which are f=2.42952 mm; f/HEP=2.02; and HAF=35.87degrees; and tan(HAF)=0.7231, where f is a focal length of the system;HAF is a half of the maximum field angle; and HEP is an entrance pupildiameter.

The parameters of the lenses of the first embodiment are f1=2.27233 mm;|f/f1|=1.0692; f3=7.0647 mm; |f1|<f3; and |f1/f3|=0.3216, where f1 is afocal length of the first lens 110; and f3 is a focal length of thethird lens 130.

The first embodiment further satisfies f2=−5.2251 mm; and |f2|>|f1|,where f2 is a focal length of the second lens 120, and f3 is a focallength of the third lens 130.

The optical image capturing system 10 of the first embodiment furthersatisfies ΣPPR=f/f1+f43=1.4131; ΣNPR=f/f2=0.4650; ΣPPR|ΣNPR|=3.0391;|f/f3|=0.3439; |f1/f2|=0.4349; |f2/f3|=0.7396, where PPR is a ratio of afocal length f of the optical image capturing system to a focal lengthfp of each of the lenses with positive refractive power; and NPR is aratio of a focal length fn of the optical image capturing system to afocal length fn of each of lenses with negative refractive power.

The optical image capturing system 10 of the first embodiment furthersatisfies InTL+InB=HOS; HOS=2.9110 mm; HOI=1.792 mm; HOS/HOI=1.6244;HOS/f=1.1982; InTL/HOS=0.7008; InS=2.25447 mm; and InS/HOS=0.7745, whereInTL is a distance between the object-side surface 112 of the first lens110 and the image-side surface 134 of the third lens 130; HOS is aheight of the image capturing system, i.e. a distance between theobject-side surface 112 of the first lens 110 and the image plane 180;InS is a distance between the aperture 100 and the image plane 180; HOis a half of a diagonal of an effective sensing area of the image sensor190, i.e., the maximum image height; and InB is a distance between theimage-side surface 134 of the third lens 130 and the image plane 180.

The optical image capturing system 10 of the first embodiment furthersatisfies ΣTP=1.4198 mm; and ΣTP/InTL=0.6959, where ITP is a sum of thethicknesses of the lenses 110-130 with refractive power. It is helpfulfor the contrast of image and yield rate of manufacture and provides asuitable back focal length for installation of other elements.

The optical image capturing system 10 of the first embodiment furthersatisfies |R1/R2|=0.3849, where R1 is a radius of curvature of theobject-side surface 112 of the first lens 110, and R2 is a radius ofcurvature of the image-side surface 114 of the first lens 110. Itprovides the first lens with a suitable positive refractive power toreduce the increase rate of the spherical aberration.

The optical image capturing system 10 of the first embodiment furthersatisfies (R5−R6)/(R5+R6)=−0.0899, where R5 is a radius of curvature ofthe object-side surface 132 of the third lens 130, and R6 is a radius ofcurvature of the image-side surface 134 of the third lens 130, h maymodify the astigmatic field curvature.

The optical image capturing system 10 of the first embodiment furthersatisfies ΣPP=f1+f3=9.3370 mm; and f1/(f1+f3)=0.2434, where f1, f3 arethe focal lengths of the first lens and the third lens, and ΣPP is a sumof the focal lengths fp of each lens with positive refractive power. Itis helpful to share the positive refractive power of the first lens 110to the other positive lens to avoid the significant aberration caused bythe incident rays.

The optical image capturing system 10 of the first embodiment furthersatisfies ΣNP=f2=−5.2251 mm, where f2 is the focal length of the secondlens, and ΣNP is a sum of the focal lengths fn of each lens withnegative refractive power. It is helpful to avoid the significantaberration caused by the incident rays.

The optical image capturing system 10 of the first embodiment furthersatisfies IN12=0.4068 mm; IN12/f=0.1674, where IN12 is a distance on theoptical axis between the first lens 110 and the second lens 120. It maycorrect chromatic aberration and improve the performance.

The optical image capturing system 10 of the first embodiment furthersatisfies TP1=0.5132 mm; TP2=0.3363 mm; and (TP1+IN12)/TP2=2.7359, whereTP1 is a central thickness of the first lens 110 on the optical axis,and TP2 is a central thickness of the second lens 120 on the opticalaxis. It may control the sensitivity of manufacture of the system andimprove the performance.

The optical image capturing system 10 of the first embodiment furthersatisfies (TP3+IN23)/TP2=2.3308, where IN23 is a distance on the opticalaxis between the second lens 120 and the third lens 130. It may controlthe sensitivity of manufacture of the system and lower the total heightof the system.

The optical image capturing system 10 of the first embodiment furthersatisfies TP2/(IN12+TP2+IN23)=0.35154; TP1/TP2=1.52615; TP2/TP3=0.58966.It may fine tune and correct the aberration of the incident rays layerby layer, and reduce the height of the system.

The optical image capturing system 10 of the first embodiment furthersatisfies TP2/ΣETP=0.2369, where ITP is a sum of thicknesses of thefirst lens 110 to the third lens 130 on the optical axis. It may linetune and correct the aberration of the incident rays, and reduce theheight of the system.

The optical image capturing system 10 of the first embodiment furthersatisfies InRS31=−0.1097 mm; InRS32=−0.3195 mm;|InRS31|+|InRS32|=0.42922 mm; |InRS31/|TP3=0.1923; and|InRS32|/TP3=0.5603, where InRS31 is a displacement from a point on theobject-side surface 132 of the third lens passed through by the opticalaxis to a point on the optical axis where a projection of the maximumeffective semi diameter of the object-side surface 132 of the third lensends; InRS32 is a displacement from a point on the image-side surface134 of the third lens passed through by the optical axis to a point onthe optical axis where a projection of the maximum effective semidiameter of the image-side surface 134 of the third lens ends; and TP3is a central thickness of the third lens 130 on the optical axis. It ishelpful for manufacturing and shaping of the lenses and is helpful toreduce the size.

The optical image capturing system 10 of the first embodiment furthersatisfies HVT31=0.4455 mm; HVT32=0.6479 mm; HVT31/HVT32=0.6876, whereHVT31 a distance perpendicular to the optical axis between the criticalpoint C31 on the object-side surface 132 of the third lens and theoptical axis; and HVT32 a distance perpendicular to the optical axisbetween the critical point C32 on the image-side surface 134 of thethird lens and the optical axis. Whereby, it is helpful to correct theoff-axis view field aberration.

The optical image capturing system 10 of the first embodiment satisfiesHVT32/HOI=0.3616. It is helpful for correction of the aberration of theperipheral view field of the optical image capturing system.

The optical image capturing system 10 of the first embodiment satisfiesHVT32/HOS=0.2226. It is helpful for correction of the aberration of theperipheral view field of the optical image capturing system.

The second lens 120 and the third lens 130 have negative refractivepower. The optical image capturing system 10 of the first embodimentfurther satisfies |NA1−NA2|=33.5951; NA3/NA2=2.4969, where NA1 is anAbbe number of the first lens 110; NA2 is an Abbe number of the secondlens 120; and NA3 is an Abbe number of the third lens 130. It maycorrect the aberration of the optical image capturing system.

The optical image capturing system 10 of the first embodiment furthersatisfies |TDT|=1.2939%; |ODT|=1.4381%, where TDT is TV distortion; andODT is optical distortion.

For the optical image capturing system of the first embodiment, thevalues of MTF in the spatial frequency of 55 cycles/mm at the opticalaxis, 0.3 field of view, and 0.7 field of view on an image plane forvisible light are respectively denoted by MTFE0, MTFE3, and MTFE7,wherein MTFE0 is around 0.86, MTFE3 is around 0.84, and MTFE7 is around0.77; the values of MTF in the spatial frequency of 110 cycles/mm at theoptical axis, 0.3 field of view, and 0.7 field of view on an image planefor visible light are respectively denoted by MTFQ0, MTFQ3, and MTFQ7,wherein MTFQ0 is around 0.63, MTFQ3 is around 0.6, and MTFQ7 is around0.48; the values of modulation transfer function (MTF) in the halfspatial frequency at the optical axis, 0.3 field of view, and 0.7 fieldof view on an image plane for visible light are respectively denoted byMTFH0, MTPH3, and MTFH7, wherein MTFH0 is around 0.36, MTFH3 is around0.35, and MTFH7 is around 0.175.

The parameters of the lenses of the first embodiment are listed in Table1 and Table 2.

TABLE 1 f = 2.42952 mm; f/HEP = 2.02; HAF = 35.87 deg; tan(HAF) = 0.7231Radius of curvature Thickness Refractive Abbe Focal length Surface (mm)(mm) Material index number (mm) 0 Object plane 600 1 1^(st) lens0.848804821 0.513 plastic 1.535 56.070 2.273 2 2.205401548 0.143 3Aperture plane 0.263 4 2^(nd) lens −1.208297825  0.336 plastic 1.64322.470 −5.225 5 −2.08494476  0.214 6 3^(rd) lens 1.77958479  0.570plastic 1.544 56.090 7.012 7 1.410696843 0.114 8 Infrared plane 0.210BK7_SCHOTT rays filter 9 plane 0.550 10 Image plane plane 0.000Reference wavelength: 555 nm; the position of blocking light: the clearaperture of the first surface is 0.640 mm.

TABLE 2 Coefficients of the aspheric surfaces Surface 1 2 4 5 6 7 k1.22106E−01 1.45448E+01 8.53809E−01 4.48992E−01 −1.44104E+01−3.61090E+00 A4 −6.43320E−04  −9.87186E−02  −7.81909E−01  −1.69310E+00 −7.90920E−01 −5.19895E−01 A6 −2.58026E−02  2.63247E+00 −8.49939E−01 5.85139E+00  4.98290E−01  4.24519E−01 A8 1.00186E+00 −5.88099E+01 3.03407E+01 −1.67037E+01   2.93540E−01 −3.12444E−01 A10 −4.23805E+00 5.75648E+02 −3.11976E+02  2.77661E+01 −3.15288E−01  1.42703E−01 A129.91922E+00 −3.00096E+03  1.45641E+03 −5.46620E+00  −9.66930E−02−2.76209E−02 A14 −1.17917E+01  7.91934E+03 −2.89774E+03  −2.59816E+01  1.67006E−01 −3.11872E−03 A16 8.87410E+00 −8.51578E+03  1.35594E+031.43091E+01 −4.43712E−02  1.34499E−03 A18 0.00000E+00 0.00000E+000.00000E+00 0.00000E+00  0.00000E+00  0.00000E+00 A20 0.00000E+000.00000E+00 0.00000E+00 0.00000E+00  0.00000E+00  0.00000E+00

The detail parameters of the first embodiment are listed in Table 1, inwhich the unit of the radius of curvature, thickness, and focal lengthare millimeter, and surface 0-10 indicates the surfaces of all elementsin the system in sequence from the object side to the image side. Table2 is the list of coefficients of the aspheric surfaces, in which A1-A20indicate the coefficients of aspheric surfaces from the fist order tothe twentieth order of each aspheric surface. The following embodimentshave the similar diagrams and tables, which are the same as those of thefirst embodiment, so we do not describe it again.

Second Embodiment

As shown in FIG. 2A and FIG. 2B, an optical image capturing system 20 ofthe second embodiment of the present invention includes, along anoptical axis from an object side to an image side, a first lens 210, anaperture 200, a second lens 220, a third lens 230, an infrared raysfilter 270, an image plane 280, and an image sensor 290. FIG. 2C shows amodulation transformation of the optical image capturing system 20 ofthe second embodiment of the present application.

The first lens 210 has positive refractive power and is made of plastic.An object-side surface 212 thereof, which faces the object side, is aconvex aspheric surface, and an image-side surface 214 thereof, whichfaces the image side, is a convex aspheric surface.

The second lens 220 has positive refractive power and is made ofplastic. An object-side surface 222 thereof, which faces the objectside, is a concave aspheric surface, and an image-side surface 224thereof, which faces the image side, is a convex aspheric surface. Theobject-side surface 222 and the image-side surface 224 both have aninflection point.

The third lens 230 has negative refractive power and is made of plastic.An object-side surface 232, which faces the object side, is a convexaspheric surface, and an image-side surface 234, which faces the imageside, is a concave aspheric surface. The object-side surface 232 and theimage-side surface 234 both have an inflection point.

The infrared rays filter 270 is made of glass and between the third lens230 and the image plane 280. The infrared rays filter 270 gives nocontribution to the focal length of the system.

The parameters of the lenses of the second embodiment are listed inTable 3 and Table 4.

TABLE 3 F = 0.9994 mm; f/HEP = 2.0414; HAF = 38.8126 deg Radius ofcurvature Thickness Refractive Abbe Focal length Surface (mm) (mm)Material index number (mm) 0 Object 1E+18 600 1 1E+18 0.000 2 1^(st)lens  0.727726867 0.219 plastic 1.535 55.688 1.176 3 −4.260379542 −0.0104 Aperture 1E+18 0.174 5 2^(nd) lens −0.424865845 0.281 plastic 1.53555.688 0.555 6 −0.215521363 0.018 7 3^(rd) lens  2.013813486 0.145plastic 1.671 19.233 −0.659 8  0.354866619 0.091 9 Infrared 1E+18 0.145BK7_SCHOTT 1.517 64.137 rays filter 10 Image plane 1E+18 0.382 Referencewavelength: 555 nm; the position of blocking light: the clear apertureof the first surface is 0.279 mm; the clear aperture of the sixthsurface is 0.394 mm.

TABLE 4 Coefficients of the aspheric surfaces Surface 2 3 5 6 7 8 k−1.800681E+00  −6.992924E+02 −1.403136E+01 −4.656570E+00 −2.260879E+02−9.700554E+00 A4 2.677063E−01 −5.396646E+00 −1.866688E+01 −2.070022E+01−2.031115E+00 −4.405551E+00 A6 −1.317500E+02   1.812408E+02 1.555455E+02  4.621414E+02  4.529216E+00  3.366285E+01 A8 8.239498E+03−7.428431E+03  6.331536E+03 −7.915026E+03 −1.562223E+02 −2.414420E+02A10 −2.491739E+05   2.561140E+05 −3.443620E+05  8.611598E+04 8.160027E+02  1.042740E+03 A12 3.810196E+06 −6.429725E+06  7.038025E+06−5.683536E+05  3.964910E+02 −2.332303E+03 A14 −2.855733E+07  9.096302E+07 −5.829145E+07  2.295657E+06  6.281934E+03  1.883332E+03A16 8.303720E+07 −5.167201E+08  7.899108E+06 −5.219291E+06 −6.812604E+03−1.935801E+03 A18 0.000000E+00  0.000000E+00  2.342135E+09  3.996043E+06−1.776870E+06  1.072431E+04 A20 0.000000E+00  0.000000E+00 −7.817283E+09 1.008407E+07  7.235509E+06 −1.123293E+04

An equation of the aspheric surfaces of the second embodiment is thesame as that of the first embodiment, and the definitions are the sameas well.

The exact parameters of the second embodiment based on Table 3 and Table4 are listed in the following table:

Second embodiment (Reference wavelength: 555 nm) MTFE0 MTFE3 MTFE7 MTFQ0MTFQ3 MTFQ7 0.93  0.9  0.86  0.82  0.74   0.63  ETP1 ETP2 ETP3 ETP1/TP1ETP2/TP2 ETP3/TP3 0.174 0.248 0.180 0.794 0.883  1.243 ETL EBL EIN EIRPIR SETP 1.411 0.580 0.831 0.053 0.091  0.602 EIN/ETL SETP/EIN EIR/PIREBL/BL BL STP 0.589 0.725 0.582  0.9379 0.6184  0.645 ED12 ED23ED12/IN12 ED23/IN23 SED SETP/STP 0.108 0.121 0.661 6.778 0.229  0.933|f/f1| |f/f2| |f/f3| |f1/f2| |f2/f3| TP1/TP2  0.84976  1.80068  1.51548 0.47191 1.18820  0.78118 ΣPPR ΣNPR ΣPPR/|ΣNPR| IN12/f IN23/f TP2/TP3 2.36524  1.80068  1.31352  0.16344 0.01785  1.93665 TP2/(IN12 + TP2 +IN23) (TP1 + IN12)/TP2 (TP3 + IN23)/TP2 0.60774 0.57990 0.57990 HOS InTLHOS/HOI InS/HOS ODT % TDT %  1.44450  0.82607  1.76159  0.85529 2.02164 1.46166 HVT21 HVT22 HVT31 HVT32 HVR32/HOI HVT32/HOS 0    0     0.186513   0.334112 0.40745  0.23130 f2/f3 CT1/CT2 CT2/CT3 (R1 −R2)/(R1 + R2) (R3 − R4)/(R3 + R4) (R5 − R6)/(R5 + R6) −0.8416  0.7812 1.9366 −1.4120 0.3269   0.7004

The results of the equations of the second embodiment based on Table 3and Table 4 are listed in the following table:

Values related to the inflection points of the second embodiment(Reference wavelength: 555 nm) HIF211 0.2337 HIF211/HOI 0.2850 SGI211−0.0700 |SGI211|/(|SGI211| + TP2) 0.2420 HIF221 0.2918 HIF221/HOI 0.3559SGI221 −0.1555 |SGI221|/(|SGI221| + TP2) 0.4149 HIF311 0.1024 HIF311/HOI0.1249 SGI311 0.0021 |SGI311|/(|SGI311| + TP3) 0.0094 HIF321 0.1426HIF321/HOI 0.1739 SGI321 0.0209 |SGI321|/(|SGI321| + TP3) 0.0870

Third Embodiment

As shown in FIG. 3A and FIG. 3B, an optical image capturing system 30 ofthe third embodiment of the present invention includes, along an opticalaxis from an object side to an image side, a first lens 310, an aperture300, a second lens 320, a third lens 330, an infrared rays filter 370,an image plane 380, and an image sensor 390. FIG. 3C shows a modulationtransformation of the optical image capturing system 30 of the thirdembodiment of the present application.

The first lens 310 has positive refractive power and is made of plastic.An object-side surface 312 thereof, which faces the object side, is aconvex aspheric surface, and an image-side surface 314 thereof, whichfaces the image side, is a convex aspheric surface. The object-sidesurface 312 has an inflection point.

The second lens 320 has positive refractive power and is made ofplastic. An object-side surface 322 thereof, which faces the objectside, is a concave aspheric surface, and an image-side surface 324thereof, which faces the image side, is a convex aspheric surface. Theobject-side surface 322 and the image-side surface 324 both have aninflection point.

The third lens 330 has negative refractive power and is made of plastic.An object-side surface 332 thereof, which faces the object side, is aconvex aspheric surface, and an image-side surface 334 thereof, whichfaces the image side, is a concave aspheric surface. The object-sidesurface 332 and the image-side surface 334 both have an inflectionpoint.

The infrared rays filter 370 is made of glass and between the third lens330 and the image plane 380. The infrared rays filter 390 gives nocontribution to the focal length of the system.

The parameters of the lenses of the third embodiment are listed in Table5 and Table 6.

TABLE 5 f = 1.0044 mm; f/HEP = 2.2900; HAF = 38.9681 deg Radius ofcurvature Thickness Refractive Abbe Focal length Surface (mm) (mm)Material index number (mm) 0 Object 1E+18 609 1 1E+18 0.000 2 1^(st)lens  0.832964003 0.178 plastic 1.535 56.049 1.219 3 −2.814919865 −0.0114 Aperture 1E+18 0.192 5 2^(nd) lens −0.417824581 0.293 plastic 1.53556.049 0.512 6 −0.206205191 0.027 7 3^(rd) lens  2.866406055 0.141plastic 1.671 19.233 −0.608 8 0.35317029 0.091 9 Infrared 1E+18 0.145BK7_SCHOTT 1.517 64.137 rays filter 10 Image plane 1E+18 0.399 Referencewavelength: 555 nm; the position of blocking light: the clear apertureof the first surface is 0.270 mm; the clear aperture of the sixthsurface is 0.397 mm.

TABLE 6 Coefficients of the aspheric surfaces Surface 2 3 5 6 7 8 k3.772566E−02 2.482659E+01 −3.098837E+00 −4.311736E+00 −1.049793E+02−1.109668E+01 A4 1.208005E+00 −2.896627E+00  −8.069277E+00 −2.168556E+01−4.912998E+00 −5.429717E+00 A6 −1.089570E+02  8.479110E+01 −1.040864E+02 4.560235E+02  2.819338E+01  4.029712E+01 A8 4.350349E+03 −6.099807E+03  8.963435E+03 −7.777411E+03 −1.404312E+02 −2.521708E+02 A10−1.822628E+05  2.477301E+05 −3.224346E+05  8.680706E+04  4.589767E+02 1.002381E+03 A12 4.309733E+06 −5.903811E+06   6.697130E+06−5.845315E+05 −1.705293E+03 −2.214136E+03 A14 −4.914249E+07 7.627264E+07 −6.315750E+07  2.294314E+06 −6.215813E+03  1.748449E+03 A162.118351E+08 −4.153807E+08  −5.057425E+07 −4.241519E+06  1.370716E+05 1.874210E+02 A18 0.000000E+00 0.000000E+00  5.400457E+09  1.160409E+06−5.778384E+05  8.991064E+03 A20 0.000000E+00 0.000000E+00 −2.786234E+10 1.649246E+06  7.660832E+05 −1.983525E+04

An equation of the aspheric surfaces of the third embodiment is the sameas that of the first embodiment, and the definitions are the same aswell.

The exact parameters of the third embodiment based on Table 5 and Table6 are listed in the following table:

Third embodiment (Reference wavelength: 555 nm) MTFE0 MTFE3 MTFE7 MTFQ0MTFQ3 MTFQ7 0.92  0.88  0.87  0.8  0.68  0.67  ETP1 ETP2 ETP3 ETP1/TP1ETP2/TP2 ETP3/TP3 0.140 0.264 0.173 0.789 0.900 1.232 ETL EBL EIN EIRPIR SETP 1.430 0.603 0.826 0.059 0.091 0.577 EIN/ETL SETP/EIN EIR/PIREBL/BL BL STP 0.578 0.699 0.651  0.9493  0.6352 0.612 ED12 ED23ED12/IN12 ED23/IN23 SED SETP/STP 0.133 0.117 0.734 4.326 0.249 0.944|f/f1| |f/f2| |f/f3| |f1/f2| |f2/f3| TP1/TP2  0.82387  1.96308  1.65130 0.41968  1.18881  0.60675 ΣPPR ΣNPR ΣPPR/|ΣNPR| IN12/f IN23/f TP2/TP3 2.47516  1.96308  1.26086  0.17978  0.02683  2.08144 TP2/(IN12 + TP2 +IN23) (TP1 + IN12)/TP2 (TP3 + IN23)/TP2 0.58550 0.57236 0.57236 HOS InTLHOS/HOI InS/HOS ODT % TDT %  1.45456  0.81936  1.77385  0.88557 −1.60144  2.40923 HVT21 HVT22 HVT31 HVT32 HVR32/HOI HVT32/HOS 0    0    0.13641   0.304956  0.37190  0.20966 f2/f3 CT1/CT2 CT2/CT3 (R1 −R2)/(R1 + R2) (R3 − R4)/(R3 + R4) (R5 − R6)/(R5 + R6) −0.8412  0.6067 2.0814 −1.8405  0.3391  0.7806

The results of the equations of the third embodiment based on Table 5and Table 6 are listed in the following table:

Values related to the inflection points of the third embodiment(Reference wavelength: 555 nm) HIF111 0.2123 HIF111/HOI 0.2589 SGI1110.025231 |SGI111|/(|SGI111| + TP1) 0.1242 HIF211 0.2348 HIF211/HOI0.2864 SGI211 −0.0769 |SGI211|/(|SGI211| + TP2) 0.3018 HIF221 0.2878HIF221/HOI 0.3510 SGI221 −0.1615 |SGI221|/(|SGI221| + TP2) 0.4760 HIF3110.0760 HIF311/HOI 0.0927 SGI311 0.0008 |SGI311|/(|SGI311| + TP3) 0.0047HIF321 0.1279 HIF321/HOI 0.1560 SGI321 0.017061 |SGI321|/(|SGI321| +TP3) 0.0875

Fourth Embodiment

As shown in FIG. 4A and FIG. 4B, an optical image capturing system 40 ofthe fourth embodiment of the present invention includes, along anoptical axis from an object side to an image side, a first lens 410, anaperture 400, a second lens 420, a third lens 430, an infrared raysfilter 470, an image plane 480, and an image sensor 490. FIG. 4C shows amodulation transformation of the optical image capturing system 40 ofthe fourth embodiment of the present application.

The first lens 410 has positive refractive power and is made of plastic.An object-side surface 412 thereof, which faces the object side, is aconvex aspheric surface, and an image-side surface 414 thereof, whichfaces the image side, is a convex aspheric surface. The object-sidesurface 412 has an inflection point.

The second lens 420 has positive refractive power and is made ofplastic. An object-side surface 422 thereof, which faces the objectside, is a concave aspheric surface, and an image-side surface 424thereof, which faces the image side, is a convex aspheric surface. Theobject-side surface 422 and the image-side surface 424 both have aninflection point.

The third lens 430 has negative refractive power and is made of plastic.An object-side surface 432 thereof, which faces the object side, is aconvex aspheric surface, and an image-side surface 434 thereof, whichfaces the image side, is a concave aspheric surface. The object-sidesurface 432 and the image-side surface 434 both have an inflectionpoint.

The infrared rays filter 470 is made of glass and between the third lens430 and the image plane 480. The infrared rays filter 470 gives nocontribution to the focal length of the system.

The parameters of the lenses of the fourth embodiment are listed inTable 7 and Table 8.

TABLE 7 f = 1.0060 mm; f/HEP = 2.2006; HAF = 38.7174 deg Radius ofcurvature Thickness Refractive Abbe Focal length Surface (mm) (mm)Material index number (mm) 0 Object 1E+18 600 1 1E+18 0.000 2 1^(st)lens  0.770326386 0.220 plastic 1.535 55.688 1.152 3 −2.823671437 −0.0124 Aperture 1E+18 0.189 5 2^(nd) lens −0.386310067 0.273 plastic 1.53555.688 0.712 6 −0.239522122 0.027 7 3^(rd) leas  0.862101725 0.140plastic 1.671 19.233 −0.864 8  0.325857965 0.091 9 Infrared 1E+18 0.145BK7_SCHOTT 1.517 64.137 rays filter 10 Image plane 1E+18 0.375 Referencewavelength: 555 nm; the position of blocking light: the clear apertureof the first surface is 0.274 mm.

TABLE 8 Coefficients of the aspheric surfaces Surface 2 3 5 6 7 9 k−4.453205E+00 8.666831E+01 −9.745885E+00 −4.018050E+00 −1.364895E+02−9.556921E+00 A4 −2.137429E−01 −6.404665E+00  −1.511289E+01−2.152573E+01 −5.411161E+00 −5.937930E+00 A6 −4.120952E+01 2.774083E+02−7.763955E+01  4.550446E+02  3.233613E+01  4.579964E+01 A8  5.136848E+03−7.825239E+03   9.953576E+03 −7.730333E+03 −1.152236E+02 −2.670342E+02A10 −2.262997E+05 1.824968E+05 −3.201198E+05  8.668565E+04  2.408465E+02 9.629067E+02 A12  4.393813E+06 −5.758541E+06   6.593271E+06−5.773985E+05 −2.076896E+03 −2.099876E+03 A14 −3.971757E+07 1.204100E+08−6.521355E+07  2.273431E+06 −6.990328E+03  2.131671E+03 A16 1.360585E+08 −9.359677E+08  −2.988393E+07 −4.629013E+06  1.272635E+05 1.236986E+02 A18  0.000000E+00 0.000000E+00  5.408610E+09  1.455364E+06−5.202241E+05 −2.793754E+03 A20  0.000000E+00 0.000000E+00 −2.753335E+10 1.537597E+07  1.095592E+06  6.572292E+03

An equation of the aspheric surfaces of the fourth embodiment is thesame as that of the first embodiment, and the definitions are the sameas well.

The exact parameters of the fourth embodiment based on Table 7 and Table8 are listed in the following table:

Fourth embodiment (Reference wavelength: 555 nm) MTFE0 MTFE3 MTFE7 MTFQ0MTFQ3 MTFQ7 0.93  0.89  0.84  0.79  0.71  0.58  ETP1 ETP2 ETP3 ETP1/TP1ETP2/TP2 ETP3/TP3 0.178 0.247 0.171 0.810 0.906 1.223 ETL EBL EIN EIRPIR SETP 1.420 0.575 0.844 0.056 0.091 0.596 EIN/ETL SETP/EIN EIR/PIREBL/BL BL STP 0.595 0.706 0.611  0.9411  0.6110 0.633 ED12 ED23ED12/IN12 ED23/IN23 SED SETP/STP 0.126 0.122 0.715 4.537 0.248 0.943|f/f1| |f/f2| |f/f3| |f1/f2| |f2/f3| TP1/TP2  0.87318  1.41315  1.16395 0.61790  1.21410  0.80485 ΣPPR ΣNPR ΣPPR/|ΣNPR| IN12/f IN23/f TP2/TP3 2.03713  1.41315  1.44155  0.17554  0.02666  1.95028 TP2/(IN12 + TP2 +IN23) (TP1 + IN12)/TP2 (TP3 + IN23)/TP2 0.57303 0.61100 0.61100 HOS InTLHOS/HOI InS/HOS ODT % TDT %  1.44716  0.83617  1.76483  0.85645  2.41996 1.28326 HVT21 HVT22 HVT31 HVT32 HVT32/HOI HVT32/HOS 0    0     0.166775   0.315703  0.3850  0.2182 f2/f3 CT1/CT2 CT2/CT3 (R1 −R2)/(R1 + R2) (R3 − R4)/(R3 + R4) (R5 − R6)/(R5 + R6) −0.8327 −1.3330 0.8049  1.9503 −1.7503  0.2345

The results of the equations of the fourth embodiment based on Table 7and Table 8 are listed in the following table:

Values related to the inflection points of the fourth embodiment(Reference wavelength: 555 mn) HIF111 0.2338 HIF111/HOI 0.2851 SGI1110.031226 |SGI111|/(|SGI111| + TP1) 0.1244 HIF211 0.2286 HIF211/HOI0.2788 SGI211 −0.07301 |SGI211|/(|SGI211| + TP2) 0.2494 HIF221 0.2731HIF221/HOI 0.3330 SGI221 −0.14124 |SGI221|/(|SGI221| + TP2) 0.3913HIF311 0.0791 HIF311/HOI 0.0965 SGI311 0.002744 |SGI311|/(|SGI311| +TP3) 0.0123 HIF321 0.1285 HIF321/HOI 0.1567 SGI321 0.01862|SGI321|/(|SGI321| + TP3) 0.0781

Fifth Embodiment

As shown in FIG. 5A and FIG. 5B, an optical image capturing system 50 ofthe fifth embodiment of the present invention includes, along an opticalaxis from an object side to an image side, a first lens 510, an aperture500, a second lens 520, a third lens 530, an infrared rays filter 570,an image plane 580, and an image sensor 590. FIG. 5C shows a modulationtransformation of the optical image capturing system 50 of the fifthembodiment of the present application.

The first lens 510 has positive refractive power and is made of plastic.An object-side surface 512, which faces the object side, is a convexaspheric surface, and an image-side surface 514, which faces the imageside, is a convex aspheric surface. The object-side surface 512 has aninflection point.

The second lens 520 has positive refractive power and is made ofplastic. An object-side surface 522 thereof, which faces the objectside, is a concave aspheric surface, and an image-side surface 524thereof, which faces the image side, is a convex aspheric surface. Theobject-side surface 522 and the image-side surface 524 both have aninflection point.

The third lens 530 has negative refractive power and is made of plastic.An object-side surface 532, which faces the object side, is a convexaspheric surface, and an image-side surface 534, which faces the imageside, is a concave aspheric surface. The object-side surface 532 has aninflection point, and the image-side surface 534 has an inflectionpoint.

The infrared rays filter 570 is made of glass and between the third lens530 and the image plane 580. The infrared rays filter 570 gives nocontribution to the focal length of the system.

The parameters of the lenses of the fifth embodiment are listed in Table9 and Table 10.

TABLE 9 f = 0.9906 mm; f/HEP = 2.2004; HAF = 39.3625 deg Radius ofcurvature Thickness Refractive Abbe focal length Surface (mm) (mm)Material index number (mm) 0 Object 1E+18 600 1 1E+18 0.000 2 1^(st)lens 0.755560397 0.220 plastic 1.535 55.69 1.164 3 −3.24140231  −0.012 4Aperture 1E+18 0.170 5 2^(nd) less −0.385118635  0.269 plastic 1.56737.32 0.655 6 −0.237712279  0.027 7 3^(rd) leas 1.219426548 0.141plastic 1.661 20.37 −0.831 8 0.363399746 0.091 9 Infrared 1E+18 0.145BK7_SCHOTT 1.517 64.14 rays filter 10 Image plane 1E+18 0.395 Referencewavelength: 555 nm; the position of blocking light: the clear apertureof the first surface is 0.254 mm.

TABLE 10 Coefficients of the aspheric surfaces Surface 2 3 5 6 7 8 k−8.631669E−01  1.163816E+02 −1.422326E+01 −3.900128E+00 −3.887160E+02−1.101600E+01 A4 6.436758E−01 −5.315387E+00  −2.455783E+01 −2.061046E+01−3.063321E+00 −4.563956E+00 A6 −1.596018E+02  2.397679E+02  1.760403E+02 4.541373E+02  2.279800E+01  3.798765E+01 A8 8.206267E+03 −9.011746E+03  7.924923E+03 −7.925713E+03 −1.605901E+02 −2.538782E+02 A10−2.409029E+05  2.309418E+05 −3.556752E+05  8.742615E+04  4.024252E+02 1.006696E+03 A12 3.815874E+06 −5.724754E+06   6.763793E+06−5.637757E+05 −1.022838E+03 −2.139985E+03 A14 −3.058215E+07 1.150791E+08 −5.777439E+07  2.305535E+06  1.137147E+04  1.678984E+03 A169.651955E+07 −1.019396E+09   4.515604E+07 −6.075618E+06  5.001461E+04−7.132659E+02 A18 0.000000E+00 0.000000E+00  3.016566E+09 −8.395059E+06−1.233233E+06  5.324760E+03 A20 0.000000E+00 0.000000E+00 −1.714271E+10 1.332777E+08  3.972734E+06 −4.700860E+03

An equation of the aspheric surfaces of the fifth embodiment is the sameas that of the first embodiment, and the definitions are the same aswell.

The exact parameters of the fifth embodiment based on Table 9 and Table10 are listed in the following table:

Fifth embodiment (Reference wavelength: 555 nm) MTFE0 MTFE3 MTFE7 MTFQ0MTFQ3 MTFQ7 0.91  0.89  0.85  0.77   0.75  0.63  ETP1 ETP2 ETP3 ETP1/TP1ETP2/TP2 ETP3/TP3 0.180 0.247 0.170 0.817  0.919 1.211 ETL EBL EIN EIRPIR SETP 1.419 0.598 0.820 0.058  0.091 0.597 EIN/ETL SETP/EIN EIR/PIREBL/BL BL STP 0.578 0.728 0.638 0.9473   0.6313 0.629 ED12 ED23ED12/IN12 ED23/IN23 SED SETP/STP 0.106 0.117 0.670 4.359  0.223 0.949|f/f1| |f/f2| |f/f3| |f1/f2| |f2/f3| TP1/TP2  0.85108  1.51292  1.192640.56254  1.26855  0.81754 ΣPPR ΣNPR ΣPPR/|ΣNPR| IN12/f IN23/f TP2/TP3 2.04371  1.51292  1.35084 0.15995  0.02713  1.91277 TP2/(IN12 + TP2 +IN23) (TP1 + IN12)/TP2 (TP3 + IN23)/TP2 0.59206 0.62272 0.62272 HOS InTLHOS/HOI InS/HOS ODT % TDT %  1.44608  0.81477  1.76351 0.85625  2.11322 0.73818 HVT21 HVT22 HVT31 HVT32 HVT32/HOI HVT32/HOS 0    0     0.173202 0.34031  0.4150  0.2353 f2/f3 CT1/CT2 CT2/CT3 (R1 − R2)/(R1 +R2) (R3 − R4)/(R3 + R4) (R5 − R6)/(R5 + R6) −0.7883 −1.4013  0.81751.9128  −1.6079  0.2367

The results of the equations of the fifth embodiment based on Table 9and Table 10 are listed in the following table:

Values related to the inflection points of the fifth embodiment(Reference wavelength: 555 nm) HIF111 0.2366 HIF111/HOI 0.2885 SGI1110.0334 |SGI111|/(|SGI111| + TP1) 0.1318 HIF211 0.2226 HIF211/HOI 0.2715SGI211 −0.0727 |SGI211|/(|SGI211| + TP2) 0.2485 HIF221 0.2816 HIF221/HOI0.3434 SGI221 −0.1490 |SGI221|/(|SGI221| + TP2) 0.4039 HIF311 0.0777HIF311/HOI 0.0947 SGI311 0.0018 |SGI311|/(|SGI311| + TP3) 0.0081 HIF3210.1382 HIF321/HOI 0.1685 SGI321 0.0191 |SGI321|/(|SGI321| + TP3) 0.0798

Sixth Embodiment

As shown in FIG. 6A and FIG. 6B, an optical image capturing system 60 ofthe sixth embodiment of the present invention includes, along an opticalaxis from an object side to an image side, a first lens 610, an aperture600, a second lens 620, a third lens 630, an infrared rays filter 670,an image plane 680, and an image sensor 60%. FIG. 6C shows a modulationtransformation of the optical image capturing system 60 of the sixthembodiment of the present application.

The first lens 610 has positive refractive power and is made of plastic.An object-side surface 612, which faces the object side, is a convexaspheric surface, and an image-side surface 614, which faces the imageside, is a convex aspheric surface. The object-side surface 612 has aninflection point.

The second lens 620 has positive refractive power and is made ofplastic. An object-side surface 622 thereof, which faces the objectside, is a concave aspheric surface, and an image-side surface 624thereof, which faces the image side, is a convex aspheric surface. Theobject-side surface 622 and the image-side surface 624 both have aninflection point.

The third lens 630 has negative refractive power and is made of plastic.An object-side surface 632, which faces the object side, is a convexaspheric surface, and an image-side surface 634, which faces the imageside, is a concave aspheric surface. The object-side surface 632 and theimage-side surface 634 both have an inflection point.

The infrared rays filter 670 is made of glass and between the third lens630 and the image plane 680. The infrared rays filter 670 gives nocontribution to the focal length of the system.

The parameters of the lenses of the sixth embodiment are listed in Table11 and Table 12.

TABLE 11 f = 0.9906 mm; f/HEP = 2.2004; HAF = 39.3625 deg Radius ofcurvature Thickness Refractive Abbe Focal length Surface (mm) (mm)Material index number (mm) 0 Object 1E+18 600 1 1E+18 0.000 2 1^(st)lens 0.769102954 0.220 plastic 1.535 56.05 1.164 3 −3.046925625  −0.0124 Aperture 1E+18 0.172 5 2^(nd) lens −0.36535734  0.261 plastic 1.53556.05 0.655 6 −0.225615434  0.027 7 3^(rd) lens 1.531166685 0.156plastic 1.681 18.15 −0.831 8 0.404291934 0.091 9 Infrared 1E+18 0.145glass 1.517 64.14 rays filter 10 Image plane 1E+18 0.387 Referencewavelength: 555 nm; the position of blocking light: the clear apertureof the first surface is 0.248 mm.

TABLE 12 Coefficients of the aspheric surfaces Surface 2 3 5 6 7 8 k−1.119534E+00  6.294409E+01 −1.351619E+01 −3.613406E+00 −8.737135E+02−1.301283E+01 A4 8.339102E−01 −5.688205E+00  −2.547838E+01 −2.060370E+01−2.716688E+00 −4.611446E+00 A6 −1.672885E+02  2.446196E+02  1.928442E+02 4.550234E+02  1.954882E+01  3.833127E+01 A8 8.366265E+03 −8.682428E+03  8.071724E+03 −7.924582E+03 −1.514013E+02 −2.550315E+02 A10−2.405572E+05  2.311054E+05 −3.544213E+05  8.761490E+04  4.698151E+02 1.013026E+03 A12 3.786031E+06 −5.929954E+06   6.762406E+06−5.613619E+05 −1.163807E+03 −2.139003E+03 A14 −3.047081E+07 1.111258E+08 −5.807419E+07  2.331151E+06  1.043366E+04  1.552384E+03 A169.731367E+07 −8.988330E+08   3.727936E+07 −6.360894E+06  4.109810E+04−6.354913E+02 A18 0.000000E+00 0.000000E+00  2.952325E+09 −8.604448E+06−1.226384E+06  6.433356E+03 A20 0.000000E+00 0.000000E+00 −1.558206E+10 1.289231E+08  4.140658E+06 −6.787073E+03

An equation of the aspheric surfaces of the sixth embodiment is the sameas that of the first embodiment, and the definitions are the same aswell.

The exact parameters of the sixth embodiment based on Table 11 and Table12 are listed in the following table:

Sixth embodiment (Reference wavelength: 555 nm) MTFE0 MTFE3 MTFE7 MTFQ0MTFQ3 MTFQ7 0.9  0.88  0.83  0.78  0.74  0.63  ETP1 ETP2 ETP3 ETP1/TP1ETP2/TP2 ETP3/TP3 0.181 0.237 0.183 0.821 0.909 1.177 ETL EBL EIN EIRPIR SETP 1.420 0.594 0.826 0.062 0.091 0.601 EIN/ETL SETP/EIN EIR/PIREBL/BL BL STP 0.582 0.728 0.681  0.9690  0.6313 0.637 ED12 ED23ED12/IN12 ED23/IN23 SED SETP/STP 0.107 0.117 0.670 4.388 0.225 0.944|f/f1| |f/f2| |f/f3| |f1/f2| |f2/f3| TP1/TP2  0.85108  1.51292  1.19264 0.56254  1.26855  0.81754 ΣPPR ΣNPR ΣPPR/|ΣNPR| IN12/f IN23/f TP2/TP3 2.04371  1.51292  1.35084  0.15995  0.02713  1.91277 TP2/(IN12 + TP2 +IN23) (TP1 + IN12)/TP2 (TP3 + IN23)/TP2 0.59206 0.62272 0.62272 HOS InTLHOS/HOI InS/HOS ODT % TDT %  1.44608  0.81477  1.76351  0.85625  2.11322 0.73818 HVT21 HVT22 HVT31 HVT32 HVT32/HOI HVT32/HOS 0    0     0.173202  0.34031  0.4150  0.2353 f2/f3 CT1/CT2 CT2/CT3 (R1 −R2)/(R1 + R2) (R3 − R4)/(R3 + R4) (R5 − R6)/(R5 + R6) −0.7883  0.8175 1.9128 −1.6079  0.2367  0.5408 MTFE0 MTFE3 MTFE7 MTFQ0 MTFQ3 MTFQ70.53  0.53  0.08  0.31  0.25  0.05 

The results of the equations of the sixth embodiment based on Table 11and Table 12 are listed in the following table:

Values related to the inflection points of the sixth embodiment(Reference wavelength: 555 nm) HIF111 0.2366 HIF111/HOI 0.2885 SGI1110.0334 |SGI111|/(|SGI111| + TP1) 0.1318 HIF211 0.2226 HIF211/HOI 0.2715SGI211 −0.0727 |SGI211|/(|SGI211| + TP2) 0.2485 HIF221 0.2816 HIF221/HOI0.3434 SGI221 −0.1490 |SGI221|/(|SGI221| + TP2) 0.4039 HIF311 0.0777HIF311/HOI 0.0947 SGI311 0.0018 |SGI311|/(|SGI311| + TP3) 0.0081 HIF3210.1382 HIF321/HOI 0.1685 SGI321 0.0191 |SGI321|/(|SGI321| + TP3) 0.0798

It must be pointed out that the embodiments described above are onlysome embodiments of the present invention. All equivalent structureswhich employ the concepts disclosed in this specification and theappended claims should fall within the scope of the present invention.

What is claimed is:
 1. An optical image capturing system, in order alongan optical axis from an object side to an image side, comprising: afirst lens having positive refractive power, a second lens havingpositive refractive power; a third lens having refractive power; and animage plane; wherein the optical image capturing system having a totalof the three lenses with refractive power; each lens among the firstlens to the third lens has an object-side surface, which faces theobject side, and an image-side surface, which faces the image side;wherein the optical image capturing system satisfies:1≤f/HEP≤10;0 deg<HAF≤50 deg; and0.5≤SETP/STP<1; wherein f is a focal length of the optical imagecapturing system; HEP is an entrance pupil diameter of the optical imagecapturing system; HAF is a half of a maximum view angle of the opticalimage capturing system; ETP1, ETP2, and ETP3 are respectively athickness of the first lens, the second lens, and the third lens at aheight of a half of the entrance pupil diameter away from the opticalaxis; SETP is a sum of the aforementioned ETP1 to ETP3; TP1, TP2, andTP3 are respectively a thickness of the first lens, the second lens, andthe third lens on the optical axis; STP is a sum of the aforementionedTP1 to TP3.
 2. The optical image capturing system of claim 1, whereinthe third lens has negative refractive power.
 3. The optical imagecapturing system of claim 1, wherein the image-side surface of the firstlens is a convex surface.
 4. The optical image capturing system of claim1, wherein the optical image capturing system further satisfies:0.2≤EIN/ETL<1; wherein ETL is a distance in parallel with the opticalaxis between a coordinate point at a height of a half of the entrancepupil diameter away from the optical axis on the object-side surface ofthe first lens and the image plane; EIN is a distance in parallel withthe optical axis between the coordinate point at the height of a half ofthe entrance pupil diameter away from the optical axis on theobject-side surface of the first lens and a coordinate point at a heightof a half of the entrance pupil diameter away from the optical axis onthe image-side surface of the third lens.
 5. The optical image capturingsystem of claim 1, wherein the optical image capturing system furthersatisfies:0.3≤SETP/EIN<1; wherein EIN is a distance in parallel with the opticalaxis between the coordinate point at the height of a half of theentrance pupil diameter away from the optical axis on the object-sidesurface of the first lens and a coordinate point at a height of a halfof the entrance pupil diameter away from the optical axis on theimage-side surface of the third lens.
 6. The optical image capturingsystem of claim 1, wherein the optical image capturing system furthersatisfies:0 mm<HOS≤1.5 mm; wherein HOS is a distance between an object-sidesurface of the first lens and the image plane on the optical axis. 7.The optical image capturing system of claim 1, wherein the optical imagecapturing system further satisfies:MTFE0≤0.2;MTFE3≥0.01; andMTFE7≥0.01; wherein MTFE0, MTFE3, and MTFE7 are respectively a value ofmodulation transfer function in a spatial frequency of 55 cycles/mm atthe optical axis, 0.3 HOI, and 0.7 HOI on the image plane for visiblelight.
 8. The optical image capturing system of claim 1, wherein theoptical image capturing system further satisfies:1.6≤f1/f2≤2.5; wherein f1 is a focal length of the first lens, and f2 isa focal length of the second lens.
 9. The optical image capturing systemof claim 1, further comprising an aperture, wherein the optical imagecapturing system further satisfies:0.2≤InS/HOS≤1.1; wherein InS is a distance between the aperture and theimage plane; HOS is a distance between the object-side surface of thefirst lens and the image plane on the optical axis.
 10. An optical imagecapturing system, in order along an optical axis from an object side toan image side, comprising: a first lens having positive refractivepower; a second lens having positive refractive power; a third lenshaving refractive power; and an image plane; wherein the optical imagecapturing system having a total of the three lenses with refractivepower; at least a surface of each of at least one lens among the firstto the third lenses has at least an inflection point; each lens amongthe first lens to the third lens has an object-side surface, which facesthe object side, and an image-side surface, which faces the image side;the object-side surface of the first lens is convex on the optical axis,and the image-side surface of the first lens is convex on the opticalaxis; wherein the optical image capturing system satisfies:1.0≤f/HEP≤10.0;0 deg<HAF≤40 deg; and0.2≤EIN/ETL<1; wherein f is a focal length of the optical imagecapturing system; HEP is an entrance pupil diameter of the optical imagecapturing system; HAF is a half of a maximum view angle of the opticalimage capturing system; ETL is a distance in parallel with the opticalaxis between a coordinate point at a height of a half of the entrancepupil diameter away from the optical axis on the object-side surface ofthe first lens and the image plane; EIN is a distance in parallel withthe optical axis between the coordinate point at the height of a half ofthe entrance pupil diameter away from the optical axis on theobject-side surface of the first lens and a coordinate point at a heightof a half of the entrance pupil diameter away from the optical axis onthe image-side surface of the third lens.
 11. The optical imagecapturing system of claim 10, wherein the third lens has negativerefractive power.
 12. The optical image capturing system of claim 10,wherein the optical image capturing system further satisfies:0.5<ED12/IN12≤0.8; wherein ED12 is a horizontal distance between thefirst lens and the second lens at the height of a half of the entrancepupil diameter away from the optical axis; IN12 is a horizontal distancebetween the first lens and the second lens on the optical axis.
 13. Theoptical image capturing system of claim 10, wherein the optical imagecapturing system further satisfies:4<ED23/IN23≤7; wherein ED23 is a horizontal distance between the secondlens and the third lens at the height of a half of the entrance pupildiameter away from the optical axis; IN23 is a horizontal distancebetween the second lens and the third lens on the optical axis.
 14. Theoptical image capturing system of claim 10, wherein the optical imagecapturing system further satisfies:MTFQ0≥0.2;MTFQ3≥0.01; andMTFQ7≥0.01; wherein HOI is a maximum height for image formationperpendicular to the optical axis on the image plane; MTFQ0, MTFQ3, andMTFQ7 are respectively values of modulation transfer function in aspatial frequency of 110 cycles/mm at the optical axis, 0.3 HOI, and 0.7HOI on an image plane for visible light.
 15. The optical image capturingsystem of claim 10, wherein at least a surface of each of at least twolenses among the first to the third lenses has at least an inflectionpoint.
 16. The optical image capturing system of claim 10, wherein theoptical image capturing system further satisfies:−2.5≤f1/f3≤−1; wherein f1 is a focal length of the first lens, and f3 isa focal length of the third lens.
 17. The optical image capturing systemof claim 10, wherein the optical image capturing system furthersatisfies:−0.9≤f2/f3≤−0.7; wherein f2 is a focal length of the second lens, and f3is a focal length of the third lens.
 18. The optical image capturingsystem of claim 10, wherein the optical image capturing system furthersatisfies:0.5≤TP1/TP2≤1; wherein TP1 is a thickness of the first lens on theoptical axis; TP2 is a thickness of the second lens on the optical axis.19. The optical image capturing system of claim 10, wherein the opticalimage capturing system further satisfies:1.5≤TP2/TP3≤2.5; wherein TP2 is a thickness of the second lens on theoptical axis; TP3 is a thickness of the third lens on the optical axis.20. An optical image capturing system, in order along an optical axisfrom an object side to an image side, comprising: a first lens havingpositive refractive power; a second lens having positive refractivepower; a third lens having negative refractive power; and an imageplane; wherein the optical image capturing system having a total of thethree lenses having refractive power; each lens among the first lens tothe third lens has an object-side surface, which faces the object side,and an image-side surface, which faces the image side; the object-sidesurface of the first lens is convex on the optical axis, and theimage-side surface of the first lens is convex on the optical axis; eachof the object-side surface and the image-side surface among the secondlens to the third lens has at least an inflection point thereon; whereinthe optical image capturing system satisfies:1.0≤f/HEP≤10;10 deg≤HAF≤50 deg;1≤HOS/HOI≤5; and0.2≤EIN/ETL<1; wherein f is a focal length of the optical imagecapturing system; HEP is an entrance pupil diameter of the optical imagecapturing system; HOS is a distance between the object-side surface ofthe first lens and the image plane on the optical axis; HAF is a half ofa maximum view angle of the optical image capturing system; HOI is amaximum height for image formation perpendicular to the optical axis onthe image plane; ETL is a distance in parallel with the optical axisbetween a coordinate point at a height of a half of the entrance pupildiameter away from the optical axis on the object-side surface of thefirst lens and the image plane; EIN is a distance in parallel with theoptical axis between the coordinate point at the height of a half of theentrance pupil diameter away from the optical axis on the object-sidesurface of the first lens and a coordinate point at a height of a halfof the entrance pupil diameter away from the optical axis on theimage-side surface of the third lens.
 21. The optical image capturingsystem of claim 20, wherein the optical image capturing system furthersatisfies:0.1≤ETP1/TP1≤1; wherein ETP1 is a thickness of the first lens at aheight of a half of the entrance pupil diameter away from the opticalaxis; TP1 is a thickness of the first lens on the optical axis.
 22. Theoptical image capturing system of claim 21, wherein the optical imagecapturing system further satisfies:−2≤(R1−R2)/(R1+R2)≤−1; wherein R1 is a radius of curvature of theobject-side surface of the first lens, and R2 is a radius of curvatureof the image-side surface of the first lens.
 23. The optical imagecapturing system of claim 20, wherein the optical image capturing systemfurther satisfies:0.2≤(R3−R4)/(R3+R4)≤0.4; wherein R3 is a radius of curvature of theobject-side surface of the second lens, and R4 is a radius of curvatureof the image-side surface of the second lens.
 24. The optical imagecapturing system of claim 20, wherein the optical image capturing systemfurther satisfies:0.4≤(R5−R6)/(R5+R6)≤0.8: wherein R5 is a radius of curvature of theobject-side surface of the third lens, and R6 is a radius of curvatureof the image-side surface of the third lens.
 25. The optical imagecapturing system of claim 20, further comprising an aperture, an imagesensor, and a driving module, wherein the image sensor is disposed onthe image plane; the driving module is coupled with the lenses to movethe lenses; the optical image capturing system further satisfies:0.2≤InS/HOS≤1.1; wherein InS is a distance between the aperture and theimage plane on the optical axis.